Plural master sheet securing means for rotary duplicating machines



July 29, 1952 s. B. D. KVARNEGARD PLURAL MASTER SHEET SECURING MEANS FOR ROTARY DUPLICATING MACHINES 2 SHEETSSHEET 1 Filed March 21, 1947 w 3 W m m M July 29, 1952 s. B. D. KVARNEGARD 7 PLURAL MASTER SHEET SECURING MEANS FOR ROTARY DUPLICATING MACHINES 2 SHEETS-SHEET 2 Filed March 21, 1947 Jrvve/ruwv SVEN BERTIL DAVID KmRNEsARo Clam/nan Patented July 29, 1952 rem OFFICE PLURAL IVIASTER SHEET SECURING MEANS- FOR ROTARY .DUPLICATING MACHINES Sven Bertil David Kvarnegard, Lilla, Essingen,

Sweden Application March 21, 1947, Serial N 0. 736,208

In Sweden April 16, 1946 3 Claims. 1

The present invention relates to duplicating machines by which matter may be simultaneously duplicated from a plurality of master sheets unto a single copy sheet, preferably according to the so called wet process, and it'relates more particularly to duplicating machines of the kind set forth in which the masters are arranged on a rotary duplicating drum with one =master di'splaceable with respect to the other in the circumferential direction of the drum, one master being preferably secured to the drum and the other master to a gathering roller disposed within the drum and adapted to be rotated with respect to the drum to selected setting positions.

It is a primary object of the invention to provide such improvements in duplicating machines of this kind that the machines may be used to particular advantage for duplicating working cards and the like, where a common heading is to be duplicated together with a selected number of text lines.

A duplicating machine which is particularly adapted for duplicating working cards has been provided according to the present invention by providing the duplicating drum behind the securing device for the non-displaceable master, in the following termed the heading master, with a longitudinally extending slot through which the master, in the following called the line master, is displaceable in the circumferential direction of the drum, and passes to the gathering when. In this manner the heading master and the line master will overlap each other on the duplicating drum without ever crossing each other, involving that a line master of the same or a larger width than that of the heading master may be used, as is generally necessary when duplicating working cards or the like.

The slot in the duplicating drum for the line master is preferablyprovided adjacent to the securing devicefor the heading master, so that the text portions oflthelheading master and the line master will be'supp'ort'ed on an uninterruptedly extending portion of the circumferential surface of the drum, involving the particular advantage "that the text may follow as close to .the heading asisdesired.

The lines on the 'lin'e master positioned below the selected line or group of lines may be withdrawn from printing any suitable ,manner, e. g. in known manner 'by means of members which automatically lift thepressiire roller ordinarily used :to press-the .copy sheet against the masters on the duplicating drum away from engagement with the drum, when the last line 7 which hould be duplicated has passed the roller.

In duplicating machines according to the invention non-desired vertical columns of matter in the line master -may readily be blocked out. For this purpose there is required, for example, only an extra slot or notch in the duplicating drum between the securing device for the heading master and the slot for the line master, in

which extra slot a block-out sheet may besecured.

Other objects and features-of the invention will appear from the following detailed descrip.-.. tion of a preferred embodiment with reference to the accompanying drawings.

In the drawings Fig. 1 is a perspective schematical view of those parts only which are essential for a duplicating machine according to the'invention. V

Fig. 2 shows a front view of the machine, partly in section.

Fig. 3 is a left hand end View of the duplicating drum.

Fig. 4 is a right hand end view of the duplicate ingdrum. I

Figs. 5 and 6 show schematically a left hand end view of the duplicating and the pres.- sure roller in and out of engagement with each other, respectively.

Fig. 7 Ba left hand end view showing thesetting wheel for the gathering or line Setting roller.

In the schematic Fig.1 the reference numeral iii designates the hollow duplicating drum, H the pressure roller which is adapted to press elastically against the drum, 1'2 the feed roller for the copy sheet or card M, and I5 the-moistening roller. The reference numeral ['6 designates the heading master sheet, which at its leading, edge is clamped in a'gripper mechanism I11 provided in a recess in the drum [-0, whereas I18 designates the line master sheet, which is inserted withits upper portion in under the "heading master [6 and carried through a longitudinally extending slot [9 made in the'wal'l of the-hollow duplicating drum adjacent to the gripper device [1, the line master being clamped at its upper edge'onto a winding-up roller or gathering roller, not shown, which is rotatably arranged within the drum and is adapted to be Sell in any desired angular position with respect to the drum. When rotating the gathering roller in the direction of the arrow with respect the drum 1 6, the line master H3 "is pulled further into th-slotrliQ; so that in thi manner the-desired line on the line master may beset immediately below 'thelower edge of the heading master-l6. 'The reference numerals 20 and 2l' designate 'two' cam members on the duplicating dru-m, said cam membersbeing displaceable in $116 circumferential direction; of

the drum and being adapted to cooperate with the pressure roller ll so as to lift the said roller away from the drum upon engagement with t roller.

If the duplicating drum ill is rotated in the direction of the arrow simultaneously with the insertion of a copy sheet or card l4 between the moistening roller l5 and the feed roller 12, said latter rollers will automatically feed the copy sheet or the card onto the pair of rollers formed by the drum l0 and the pressure roller ll, so that on continued rotation the copy sheet or card will be pressed successively by the pressure roller II with its moistened upper side against the duplicating drum l0 and the masters I6 and I8 carried thereby. In this manner the text on the heading master i6 is first printed or duplicated onto the card and thereafter the uppermost exposed line 22 on the line master l8. when said line has passed the pressure roller H, the cam members 20 and 2i engage the pressure roller H and lift said roller out of contact with the duplicating drum Ill, so that when the text line 23 on the line master l8 reaches its duplicating position, the pressure roller does not press the card against the drum any more, wherefore no printing or duplicating of the line 23 and of the following lines occurs.

If instead the line 23 is to be duplicated together with the heading, the line master I8 is advanced one line pitch in under the heading master I6 by turning the gather roller provided within the duplicating drum ID, the line 22 being then blocked out by the heading master [6 while line 23 instead gets into duplicating position. In this manner it is possible successively to bring each line of the line master into duplicating position and to obtain prints of the heading together with any one of the lines.

If it is desired to duplicate two or more of the lines of the'line master together with the text of the heading master this may be effected by turning back the cam members 20 and 2i a corresponding number of line pitches, the duplication of all the lines together with the heading being obtainable by making thecam members 20 and 21 entirely inoperative.

In case the line master is provided with a text comprising substantially vertical columns, se-

lected columns may be readily blocked out, e. g.

by inserting a block-out sheet, not shown, between the heading master and the line master and secure said block-out sheet at its leading edge in an extra slot 24 extending in the longitudinal direction of the drum and disposed between the gripper device [1 for the heading master and the slot [9 for the line master.

In the practical embodiment of the duplicating machine according to the invention illustrated in Figs. 2 to 7, the duplicating drum ID, the pressure roller II and the rollers i2 and [5 are journalled in ordinary manner in a frame of which only the two sides 25 and 26 are partly shown. The hollow duplicating drum i0 is rotatably carried by a shaft 21, which in turn is rotatably journalled in'the side frames 25 and 23 and on which is keyed a winding-up or gathering roller 28 disposed within the drum, said gathering roller being adapted to be set in the desired angular position with respect to the drum if! by means of a hand wheel 30 provided with graduations 29 and keyed onto the end of the shaft 2'! extending through left hand side frame 25. For locking the roller 28 in angular positions corresponding to the different text lines on the line master [8 the gathering roller 28 is provided with a toothedi ring 3| with which a detent 33, which is pivotedin the left hand end wall 32 of the drum In, co operates under the action of a spring 34. The detent 33 may be lifted out of. its engaging posi-- tion by depressing a knob 36 which is longitudinally displaceable in the side frame 25 against the action of a spring 35. Similarly to the duplicating drum the gathering roller 28 is provided with a gripper device, consisting of a gripper bar 31 disposed in a longitudinal slot and adapted under the action of springs, not shown, topress: against one edge of the slot. Within the gathering roller 28 is rotatably journalled a. shaft 38 extending in parallel with the gripper part1 out through the right hand end wall of the roller;- the shaft carrying at its projecting end an arm- 39. The shaft 38 is shaped with a number of evenly'spaced notches having diametrically ex-- tending bottom portions, in which notches cor-' responding pins 40' on the gripper bar 31 project in such positions that on the turning of the shaft 38 the straight bottoms of the shaft 38 act as cam members and displace the gripper bar to its open position against the action of the springs. For the turning of the shaft 38 there is provided a curved disk 42 which is rotatably journaled in the right hand side frame 26 and provided with a thumb grip 4|, said curved disk being adapted to be swung down through a slot 43 extending circumferentially in the drum [B and engage the arm 39, when the drum l0 and the roller 28 take up their relative positions shown in Fig. 4 with the gripper device on the gathering roller 23 right opposite the longitudinally extending slot 19 in the duplicating drum.

The pressure roller H is assumed to be jour'- nailed in a rocking frame, not shown, so that the roller may be rocked from its operative position; in which it presses elastically against the dupli-- eating drum in, to an inoperative position, in- Which the roller does not contact the drum. On the ends of the shaft 45 for the pressure roller l I are rotatably and axially displaceably mounted two wheels and 41 adapted to cooperate each with a correspondin one of the cam members 2! and 22 disposed on the duplicating drum I0, said cam members, when engaging the wheels, lifting the roller 1 l away from engagement with the drum H]. The cam members 2| and 22 are assumed to be adjustable on the drum [0 in the circumferential direction thereof. The wheels 46 and 4'! may, if desired, be moved away from the range of operation of the cam members 2! and 22 on the actuation of a shifting mechanism. Said shifting mechanism comprises a shaft 49 which is journalled in the frame and provided with a hand crank 48, said shaft being provided near its ends with a left hand and a right hand thread upon which corresponding nuts 50 and 5| are screwed. A fixed rod 52, which extends in parallel with the shaft 49 through holes in the nuts 53 and 5!, prevents turning of the nuts on the turning of the shaft 49, so that the turning of the shaft will cause the nuts to move towards or away fromeach other. Each nut 50 or 5| respectively engages with a fork-shaped extension a corresponding wheel 46 or 41 respectively on the shaft of the pressure roller H, so that the wheels are forced to follow the nuts and thus to be simultaneously displaced from their engaging positions to their inoperative positions shown in dotted lines.

The invention is not limited to the embodiment shown on the drawings but modifications of the invention. For preventing the duplication of those lines on the line master, which are positioned below the selected line or group of lines, it is thus e. g. possible to use other means than those shown on the drawings and described above. Among such other conceivable means may be mentioned a thin block-out plate which is curved around the duplicating drum and is displaceable around the same. Also other modifications are conceivable without receding from the idea of the invention.

I claim:

1. A duplicating machine comprising in combination, a frame, a drum arranged for operative rotation in a predetermined direction in said frame, clamping means carried by said drum for clamping one edge of a first master sheet to said drum, said drum being provided with a slot substantially parallel to the axis of rotation of said drum for passage of a second master sheet therethrough, said slot being arranged in immediate vicinity to and behind said clamping means with regard to said predetermined direction of rotation of said drum, actuating means associated with said clamping means for selectively opening or closing the said clamping means, a gathering roller' arranged inside said drum and adapted selectively to rotate with said drum and relative to said drum about its own axes for respectively holding and gathering said second master sheet, means journalled in said frame for rotating the said gathering roller, gripper means associated with said gathering roller for adjustably securing said second master sheet to said gathering roller, and means mounted on said frame operable for actuating said gripper means at a predetermined position of said gathering roller.

2. A duplicating machine comprising in combination, a frame, a drum arranged for operative rotation in a predetermined direction in said frame, clamping means carried by said drum for clamping one edge of a first master sheet to said drum, said drum being provided with a slot substantially parallel to the axis of rotation of said drum for passage of a second master sheet therethrough, said slot being arranged in immediate vicinity to and behind said clamping means with regard to said predetermined direction of rotation of said drum, actuating means associated with said clamping means for selectively opening or closing the said clamping means, a gathering roller arranged inside said drum and adapted selectively to rotate with said drum and relative to said drumabout its own axes for respectively holding and gathering said second master sheet, means journalled in said frame for rotating the said gathering roller, gripper means associated with said gathering roller for adjustably securing said second master sheet to said gathering roller, means mounted on said frame operable for actuating said gripper means at a predetermined position of said gathering roller, and means for selectively locking said gathering roller in difierent angular positions.

1 3. A duplicating machine comprising in combination, a frame, a drum arranged for operative rotation in a predetermined direction in said frame, clamping means carried by said drum for clamping one edge of a first master sheet to said drum, said drum being provided with a slot substantially parallel to the axis of rotation of said drum for passage of a second master sheet therethrough, said slot being arranged in immediate vicinity to and behind said clamping means with regard to said predetermined direction of rotation of said drum, a second slot arranged parallel to and spaced from said first mentioned slot, actuating means associated with said clamping means for selectively opening or closing the said clamping means, a gathering roller arranged inside said drum and adapted selectively to rotate with said drum and relative to said drum about its own axes for respectively holding and gathering said second master sheet, means journalled in said frame for rotating the said gathering roller, gripper means associated with said gathering roller for adjustably securing said second master sheet to said gathering roller, and means mounted on said frame operable for actuating said gripper means at a predetermined position of said gathering roller.

SVEN BERTIL DAVID KVARNEGARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,645,930 Ritzerfeld Oct. 18, 1927 1,951,954 Wagner Mar. 20, 1934 2,083,044 Storck June 8, 1937 2,240,026 Avery Apr. 29, 1941 2,387,739 Bradt Oct. 30, 1945 2,387,740 Bradt Oct. 30, 1945 

